Did you download the latest version of Novus (1.0.1)? This should be fixed in the latest version on the forge site. Basically, just replace your "rt_styleloader.php" and "rt_styleswitcher.php" files with the ones attached below.
I downloaded it from the RT site this morning and installed it. I assumed it would have been the latest updated version. I'll try your files in the morning. Thanks.